What am I doing Wrong

JavaScript
1

A new day, a new problem I’m struggling with.
I’m working through the simply JS book, and I can’t get the “Core.getElementByClass” to work.

var Ruler =
{
init: function()
{
var animal = Core.getElementsByClass(“look”);

if (animal)
{
  alert(animal.nodeName);
}
else
{
  alert("Not found");
}

}
};

Core.start(Ruler);

There is only one html class tag with the value “look” in my code. I do load the core.js, before my script file(both external files).
But when my program runs, JS pops up an “undefined” alert box.

Please help!

2

Core.getElementsByClass() should return an array of nodes, since many elements can belong to the same class. Try something like this,

var Ruler = {
    init: function() {
        var animals = Core.getElementsByClass("look");

        if (animals.length > 0) {
            for (var i = 0; i < animals.length; ++i) {
                alert(animals[i].nodeName);
            }
        } else {
            alert("Not found");
        }
    }
};

Core.start(Ruler);